If its says its 200mg/ml then that means that 1ml of the solution contains 200mg of tren enanthate. Its just like comparing test prop to test enanthate. The only difference between tren acetate, the kind you used before, and tren enanthate is the ester. Its a longer ester and will keep blood levels at a stable level much longer. Only need to do it 2x per week max, once per week is just fine. This compound, in my opinion, is not for beginners. I do not recommend that you use it for the simple fact that its way to easy to get your levels too high on this stuff. It builds up over the weeks and if you get it too high you will suffer many side effects and feel like shit. Better to stick with acetate so that you can bring your levels down fast if you get sides.